Question

Which of the following is equal to (9 + 4i) - (-3 - 6i)?

Answer 1

Given:

There is an expression given as below

`\left(9+4i\right)-(-3-6i)`

Required:

We need to find the correct option after simplify the given expression

Step-by-step explanation:

`\begin{gathered} (9+4i)-(-3-6i) \\ =9+4i+3+6i \\ =12+10i \end{gathered}`

Final answer:

12+10i